US3737513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of uranium from an organic extractant by back extraction with h3po4 or hf
Assignee: Freeport Mcmoran Resource Partners Ltd
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Filing: 1970-07-02
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Granted: 1973-06-05
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Expires: 1990-07-02
Abstract
Abstract A PROCESS FOR THE RECOVERY OF URANIUM VALUES FROM URANIUM CARRYING EXTRACTS CONTAINING A DIALKYLPHOSPHORIC ACID AND A TRIALKYLPHOSPHINE OXIDE DISSOLVED IN AN ORGANIC SOLVENT IS DESCRIBED. THE PROCESS INVOLVES LIQUIDLIQUID EXTRACTION OF THE EXTRACTANTS WITH AN AQUEOUS SOLUTION CONTAINING DIVALENT IRON AND A COMPLEXING AGENT WHICH MAY BE EITHER PHOSPHORIC ACID, HYDROFLUORIC ACID OR MIXTURES THEREOF.
Inventors
- 👤 T Wiewiorowski
- 👤 D Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:21
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/026; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0488
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |